The Streamlight C.O.P.S. Nano Light II Flashlight delivers 20 lumens, with a beam distance of 22 meters and a candela rating of 120. This compact flashlight is powered by one AAAA alkaline battery, which is included. Its rotating on/off head switch allows for easy operation, while the non-rotating snap hook makes it simple to attach to a keychain for one-handed use.Key FeaturesLED Technology: Features an LED that is impervious to shock with a 50,000-hour lifetime.Durable Construction: Made from 6000 series machined aircraft aluminum with an anodized finish.Water Resistance: Rated IPX7 waterproof to 1 meter for 30 minutes.Impact Resistance: Tested for 2-meter impact resistance.Compact Size: Measures 2.2 inches in length and weighs only 0.6 ounces.This flashlight also comes with a limited lifetime warranty.